I recently noticed that one of my chickens has been laying very soft eggs. Today noticed one of my chickens trying to to lay and egg all day in the yard. I isolated her int the coop to keep an eye on her. Later at night i noticed that she laid a broken egg. I looked at her vent an noticed it was swollen above the vent, not below. I have no idea what it is and if there is anything i can do about it. it has some scabs over it. Please help!